Weschler Instruments – Manufacturer & distributor of measurement & control equipment
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Weschler Instruments is a manufacturer and distributor of electrical and electronic measurement equipment. Customers worldwide use our products in power plants, steel mills, chemical plants, paper mills and other industrial applications that require rugged, reliable and accurate instrumentation.
All Categories > Test Equipment > Megger® Hand-Held TTR > Item # ME/TTR20  
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Item # ME/TTR20, Handheld TTR with 6ft (1.8m) test leads

Megger® Hand-Held TTR

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  • Single- and three-phase transformer testing
  • Fully automatic; fast; easy-to-use; robust; lightweight
  • Battery powered
  • Tests turns ratio, excitation current and polarity
  • Simple, one-button operation
  • Quick-start guide on front panel


Excitation Voltage

8 V rms for testing distribution or power transformers & PTs;0.5, 1.5, or 8 V ac rms for testing CTs (switchedautomatically if current exceeds a preset value)

Test Frequency

55 Hz

Excitation Current

Range 0 to 100 mA, 4-digit resolution

Turns Ratio Range

0.8 to 10000, 5-digit resolution

Transformer Polarity

Normal or reversed

Current Accuracy

2% of reading ±1 digit

Turns Ratio Accuracy

0.1% (0.8 to 2000)
0.15% (2001 to 4000)
0.25% (4001 to 10,000)

Measuring Time

Less than 5 seconds

Measurement Method

ANSI/IEEE C57.12.90

Phase Relationship

ANSI C57.12.70-1978


Graphic LCD, adjustable back-lighting


IEC-1010-1, CE and ASTM D999.75

Operating Temperature

-20°C to 55°C (-5°F to 130°F), < 90% RH non-condensing


Six standard AA alkaline batteries

Battery Life

12 hours of field operation

Dimensions (H x W x D)

9.5 x 4.5 x 1.9 in
240 x 115 x 50 mm


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Hand-Held TTR Accessories

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